Sweeping and vibrating integrated servo motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a sweeping and vibrating integrated servo motor. The utility model relates to a sweeping and vibrating integrated servo motor, which comprises a shell; the rotor assembly is arranged in the shell, and the rotor assembly comprises an output shaft; the stator assembly is installed in the shell, the rotor assembly is sleeved with the stator assembly, the stator assembly comprises a stator coil, a stator iron core and an insulating support, the stator iron core is provided with a protruding structure extending in the axis direction of the stator iron core, and the insulating support is arranged on the stator coil. A first mounting cavity and a second mounting cavity which are alternately arranged in the circumferential direction of the insulating support are formed in the insulating support, the first mounting cavity is used for mounting a stator coil, the second mounting cavity is used for mounting a convex structure, and the stator coil and the stator core are separated by the insulating support. According to the utility model, the structure of the sweeping and vibrating integrated servo motor is more compact.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically a sweeping and vibration integrated servo motor. Background Technology

[0002] A sweeping and vibrating servo motor used in electric toothbrushes drives the brush head to vibrate at high frequency while rotating around the motor's axis, thus enabling the brush head to meet the movement requirements of the Bass brushing technique. Because this type of motor needs to be mounted on the toothbrush handle, it requires a compact structure. However, current sweeping and vibrating servo motors often have a large size due to the need to house multiple components such as coils, stator cores, and rotor permanent magnets, and the precise relative positional relationship between the coils and stator core. This makes them unsuitable for the installation requirements of electric toothbrushes. Utility Model Content

[0003] In view of this, the present invention provides a sweeping and vibration integrated servo motor to solve the technical problems of large size and insufficient compact structure of the sweeping and vibration integrated servo motor in the prior art.

[0004] The first aspect of this utility model is that the integrated sweeping and vibration servo motor includes:

[0005] shell;

[0006] A rotor assembly, disposed within the housing, the rotor assembly including an output shaft;

[0007] A stator assembly is installed in the housing and sleeved outside the rotor assembly. The stator assembly includes a stator coil, a stator core, and an insulating support. The stator core has a protruding structure extending in the axial direction of the stator core. The insulating support has a first mounting cavity and a second mounting cavity alternately arranged in the circumferential direction of the insulating support. The first mounting cavity is used to install the stator coil, and the second mounting cavity is used to install the protruding structure. The stator coil and the stator core are separated by the insulating support.

[0008] Preferably, the rotor assembly further includes a rotor support and a rotor permanent magnet, wherein the rotor support is provided with mounting slots arranged along the circumferential direction of the rotor support, and the rotor permanent magnet is installed in the mounting slots.

[0009] Preferably, the rotor support is provided with a mounting hole that extends through the rotor support along the axial direction of the rotor assembly, and the output shaft passes through the mounting hole.

[0010] Preferably, the first mounting cavity extends along the axial direction of the stator assembly, and the cross-section of the first mounting cavity perpendicular to the axial direction of the stator assembly is fan-shaped.

[0011] Preferably, the insulating support includes a cylindrical main body, and the inner wall of the main body is provided with a plurality of protrusions extending toward the center of the insulating support. The protrusions are spaced apart along the circumferential direction of the insulating support, and the second mounting cavity penetrates the protrusions along the radial direction of the insulating support.

[0012] Preferably, the protrusion is provided with a flange at one end near the rotor assembly axis, the flange extends on both sides along the circumferential direction of the insulating support, and the stator core is located on the side of the flange away from the rotor assembly.

[0013] Preferably, the opposite sides of two adjacent protrusions, the main body portion, and the flange form the first mounting cavity.

[0014] Preferably, the assembly also includes a bearing, which is sleeved on the output shaft, and a spring, one end of which abuts against the rotor assembly and the other end of which abuts against the bearing.

[0015] Preferably, it also includes a position sensor for detecting the rotational position of the rotor assembly.

[0016] Preferably, it further includes a control circuit, which is electrically connected to the stator coil and is used to supply power to the coil.

[0017] Beneficial Effects: The sweeping and vibrating integrated servo motor of this invention places both the first and second mounting cavities on an insulating bracket, thereby simultaneously positioning the stator coil and stator core using the insulating bracket. This ensures that the stator coil and stator core have accurate relative positions after installation, guaranteeing that the coil can provide the required changing magnetic field to drive the rotor movement when energized. Since the first and second mounting cavities are alternately arranged along the circumferential direction of the insulating bracket and separated by it, the stator core and stator coil can maintain good insulation while being compactly arranged. This makes the overall structure of the sweeping and vibrating integrated servo motor more compact, which is beneficial for installation in space-constrained electric toothbrush handles. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the sweeping and vibration integrated servo motor of this utility model;

[0020] Figure 2This is an exploded structural diagram of the sweeping and vibration integrated servo motor of this utility model;

[0021] Figure 3 This is a cross-sectional view of the sweeping and vibration integrated servo motor of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the insulating support of this utility model;

[0023] Figure 5 This is a cross-sectional view of the stator core of this utility model;

[0024] Figure 6 This is a schematic diagram of the assembly structure of the rotor permanent magnet and rotor core of this utility model.

[0025] The components and their numbers shown in the picture:

[0026] 1. Outer shell; 2. Rotor assembly; 21. Rotor bracket; 21. Mounting groove; 212. Mounting hole; 213. Rotor permanent magnet; 22. Output shaft; 23. Stator assembly; 3. Stator core; 31. Protrusion structure; 311. Insulating bracket; 32. First mounting cavity; 321. Second mounting cavity; 322. Main body; 323. Protrusion; 324. Flange; 325. Bearing; 4. Spring; 5. Position sensor; 6. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides a sweeping and vibration integrated servo motor, which mainly includes a housing 1, a rotor assembly 2, and a stator assembly 3.

[0030] like Figure 3 As shown, the outer casing 1 is used to house, support, and protect other components in the sweeping and vibrating integrated servo motor. In a specific implementation, the outer casing 1 is roughly a hollow cylindrical structure.

[0031] The rotor assembly 2 is disposed in the housing 1. The rotor assembly 2 includes an output shaft 23. Under the drive of a changing electromagnetic field, the rotor assembly 2 vibrates back and forth along the axial direction of the sweeping and vibrating integrated servo motor, and rotates back and forth around the axis of the sweeping and vibrating integrated servo motor while vibrating.

[0032] In this embodiment, the stator assembly 3 is installed in the housing 1, and the stator assembly 3 is sleeved on the outside of the rotor assembly 2. The stator assembly 3 is cylindrical with through holes to fit into the housing and be installed inside the housing. The rotor assembly 2 can be placed in the through holes of the stator assembly 3, thereby saving space and making the overall structure of the sweeping and vibrating integrated servo motor more compact.

[0033] The stator assembly 3 includes stator coils, a stator core 31, and an insulating support 32. For example... Figure 4 As shown, the stator core 31 is provided with a protruding structure 311 extending in the axial direction of the stator core 31.

[0034] like Figure 5 As shown, the insulating bracket 32 ​​is provided with a first mounting cavity 321 and a second mounting cavity alternately arranged along the circumferential direction of the insulating bracket 32. The first mounting cavity 321 is used to install the stator coil, and the second mounting cavity is used to install the protrusion structure 311. The stator coil and the stator core 31 are separated by the insulating bracket 32.

[0035] Under the combined action of the stator coil and the stator core 31, when a preset current is applied to the stator coil, a changing electromagnetic field can be formed in the surrounding space. This changing electromagnetic field can drive the rotor assembly 2 to move. To prevent the stator core 31 and the stator coil from conducting electricity to each other, this embodiment uses an insulating bracket 32 ​​to separate the two. At the same time, the insulating bracket 32 ​​is used to install and position the stator core 31 and the stator coil respectively, so that the stator core 31 and the stator coil maintain a fixed relative position, so that the stator coil can generate the expected electromagnetic field after being energized.

[0036] In this embodiment, the first mounting cavity 321 and the second mounting cavity are arranged alternately, so that after installation, the stator coil and stator core 31 can be arranged in an alternate manner to form a compact arrangement.

[0037] In this embodiment, by placing both the first mounting cavity 321 and the second mounting cavity on the insulating bracket 32, the insulating bracket 32 ​​simultaneously positions the stator coil and the stator core 31. This ensures that the stator coil and the stator core 31 have accurate relative positions after installation, thereby guaranteeing that the coil can provide the required changing magnetic field to drive the rotor movement after being energized. Since the first mounting cavity 321 and the second mounting cavity are alternately arranged along the circumferential direction of the insulating bracket 32 ​​and separated by it, the stator core 31 and the stator coil can maintain good insulation while being compactly arranged. This makes the overall structure of the sweeping and vibrating integrated servo motor more compact, which is beneficial for installation in space-constrained electric toothbrush handles.

[0038] like Figure 6As shown, in this embodiment, the rotor assembly 2 further includes a rotor support 21 and a rotor permanent magnet 22. The rotor support 21 is provided with a mounting groove 212 arranged along the circumferential direction of the rotor support 21, and the rotor permanent magnet 22 is installed in the mounting groove 212.

[0039] In this embodiment, the rotor permanent magnet 22 is installed and fixed using the rotor bracket 21, specifically through the mounting groove 212. Since the mounting groove 212 is formed by an inward indentation from the outer surface of the rotor bracket 21, the rotor permanent magnet 22 can be embedded into the rotor bracket 21 after installation, forming an integrated structure with it, thus making the overall structure of the rotor assembly 2 more compact. The mounting groove 212 is arranged along the circumferential direction of the rotor bracket 21, ensuring that the rotor permanent magnet 22 is distributed in all directions, which is beneficial for the rotor assembly 2 to move under electromagnetic field drive.

[0040] like Figure 6 As shown, the rotor support 21 is provided with a mounting hole 213 that extends through the rotor assembly 2 along the axial direction of the rotor support 21, and the output shaft 23 passes through the mounting hole 213.

[0041] In this embodiment, the output shaft 23 is positioned within the mounting hole 213 of the rotor support 21, forming an integrated structure with the rotor support 21 and the rotor permanent magnet 22. This not only makes the rotor assembly 2 more compact but also facilitates the movement of the rotor support 21 and the output shaft 23 together under the influence of the magnetic field. Specifically, a step can be provided at the end of the output shaft 23 that protrudes from the mounting hole 213 and is closer to the load. This step accurately defines the axial position between the output shaft 23 and the mounting support. The end of the output shaft 23 that is away from the load and protrudes from the mounting hole 213 can be positioned detectable by the position sensor 6, allowing the position sensor 6 to accurately detect the movement position of the output shaft 23.

[0042] In this embodiment, the first mounting cavity 321 extends along the axial direction of the stator assembly 3, and the cross-section of the first mounting cavity 321 perpendicular to the axial direction of the stator assembly 3 is fan-shaped. This embodiment arranges the first mounting cavity 321 along the axial direction of the stator assembly 3, which is consistent with the length direction of the electric toothbrush handle, thereby providing a strong magnetic field to drive the electric toothbrush to vibrate at high frequency along the axial direction.

[0043] like Figure 5As shown, in this embodiment, the insulating bracket 32 ​​includes a cylindrical main body portion 323. The inner wall of the main body portion 323 is provided with a plurality of protrusions 324 extending toward the center of the insulating bracket 32. The protrusions 324 are spaced apart along the circumferential direction of the insulating bracket 32. The second mounting cavity penetrates the protrusions 324 along the radial direction of the insulating bracket 32.

[0044] In this embodiment, the protrusion 324 divides the internal space of the insulating bracket 32 ​​into multiple subspaces to accommodate different stator coil windings. On the other hand, the second mounting cavity formed by the protrusion 324 is used to place the stator core 31. The protrusion 324 simultaneously forms the first mounting cavity 321 and the second mounting cavity, resulting in fewer parts and a simpler structure for the sweeping and vibration integrated servo motor.

[0045] In specific implementation, the second mounting cavity has one end that passes through the protrusion 324 in the axial direction away from the load end of the output shaft 23, while the other end does not pass through the protrusion 324. During installation, the protrusion structure 311 of the stator core 31 can be inserted into the second mounting cavity from the through end. This allows for quick installation of the protrusion structure 311 of the stator core 31 and accurate positioning of the stator core 31 through the cooperation of the protrusion structure 311 and the second mounting cavity.

[0046] In this embodiment, a flange 325 is provided at one end of the protrusion 324 near the axis of the rotor assembly 2. The flange 325 extends on both sides along the circumferential direction of the insulating support 32, and the stator core 31 is located on the side of the flange 325 away from the rotor assembly 2.

[0047] In this embodiment, the volume of the second mounting cavity is increased by providing a flange 325 at one end near the rotor assembly 2, so that the stator core 31 can be embedded more deeply into the insulating support 32, thereby further improving the compactness of the overall structure.

[0048] In this embodiment, the opposite sides of the two adjacent protrusions 324, the main body portion 323, and the flange 325 form the first mounting cavity 321.

[0049] In this embodiment, the protrusion 324, the main body 323, and the flange 325, which are all part of the insulating components, are used to form the first mounting cavity 321, which can reduce the number of parts used. Since the flange 325 extends along both sides of the insulating support 32 in the circumferential direction, the second mounting cavity below the flange 325 can also extend along both sides of the insulating support 32 in the circumferential direction. In this way, after the protrusion structure 311 of the stator coil and the stator core 31 is installed, they can overlap to a certain extent in the circumferential direction and be isolated from each other by the insulating support 32, thereby making the structure of the sweeping and vibration integrated servo motor more compact.

[0050] In this embodiment, the sweeping and vibration integrated servo motor also includes a bearing 4, which is sleeved on the output shaft 23, and a spring 5, one end of which abuts against the rotor assembly 2 and the other end of which abuts against the bearing 4.

[0051] In this embodiment, on the one hand, the bearing 4 is used to enable the output shaft 23 to rotate rapidly relative to the housing, and on the other hand, the bearing 4 is used to limit one end of the spring 5 so that when the output shaft 23 moves in the axial direction under the drive of the electromagnetic field, the spring 5 can be compressed. Then, the tendency of the spring 5 to restore elastic deformation is used to drive the output shaft 23 to move back, thereby performing high-frequency vibration under the synergistic effect of the electromagnetic field and the elastic force of the spring 5.

[0052] The sweeping and vibrating integrated servo motor in this embodiment also includes a position sensor 6, which is used to detect the rotational position of the rotor assembly 2. This embodiment uses the position sensor 6 to provide real-time feedback on the position of the rotor assembly 2 and performs closed-loop control of the rotor assembly 2 based on its target and actual positions, thereby significantly improving the control accuracy of the sweeping and vibrating integrated servo motor.

[0053] In this embodiment, the sweeping and vibration integrated servo motor also includes a control circuit, which is electrically connected to the stator coil and is used to supply power to the coil.

[0054] The control circuit is used to control the current supplied to the coil and to control the changing electromagnetic field that drives the rotor by controlling the current. The parameters of the current it controls include, but are not limited to, frequency, amplitude, and phase.

[0055] The above description is merely a specific embodiment of this utility model. Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A sweeping and vibration integrated servo motor, characterized in that, include: shell; A rotor assembly, disposed within the housing, the rotor assembly including an output shaft; A stator assembly is installed in the housing and sleeved outside the rotor assembly. The stator assembly includes a stator coil, a stator core, and an insulating support. The stator core has a protruding structure extending in the axial direction of the stator core. The insulating support has a first mounting cavity and a second mounting cavity arranged alternately in the circumferential direction of the insulating support. The first mounting cavity is used to install the stator coil, and the second mounting cavity is used to install the protruding structure. The stator coil and the stator core are separated by the insulating support.

2. The sweeping and vibration integrated servo motor according to claim 1, characterized in that, The rotor assembly also includes a rotor support and a rotor permanent magnet. The rotor support is provided with mounting slots arranged along the circumferential direction of the rotor support, and the rotor permanent magnet is installed in the mounting slots.

3. The sweeping and vibration integrated servo motor according to claim 2, characterized in that, The rotor support is provided with a mounting hole that extends through the rotor assembly along the axial direction, and the output shaft passes through the mounting hole.

4. The sweeping and vibration integrated servo motor according to claim 1, characterized in that, The first mounting cavity extends along the axial direction of the stator assembly, and the cross-section of the first mounting cavity perpendicular to the axial direction of the stator assembly is fan-shaped.

5. The sweeping and vibration integrated servo motor according to claim 4, characterized in that, The insulating support includes: a cylindrical main body, the inner wall of which is provided with a plurality of protrusions extending toward the center of the insulating support, the protrusions being spaced apart along the circumferential direction of the insulating support, and the second mounting cavity penetrating the protrusions along the radial direction of the insulating support.

6. The sweeping and vibration integrated servo motor according to claim 5, characterized in that, The protrusion is provided with a flange at one end near the rotor assembly axis. The flange extends on both sides along the circumferential direction of the insulating support, and the stator core is located on the side of the flange away from the rotor assembly.

7. The sweeping and vibration integrated servo motor according to claim 6, characterized in that, The two adjacent protrusions facing each other, the main body portion, and the flange form the first mounting cavity.

8. The sweeping and vibration integrated servo motor according to claim 1, characterized in that, The servo motor also includes a bearing and a spring. The bearing is sleeved on the output shaft, and one end of the spring abuts against the rotor assembly, while the other end abuts against the bearing.

9. The sweeping and vibration integrated servo motor according to any one of claims 1 to 8, characterized in that, The servo motor also includes a position sensor for detecting the rotational position of the rotor assembly.

10. The sweeping and vibration integrated servo motor according to claim 9, characterized in that, The servo motor further includes a control circuit, which is electrically connected to the stator coil and is used to supply power to the coil.

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